December weather forecastJohnstone, United Kingdom
December
Weather in December
December, the first month of the winter in Johnstone, is also a wintry month, with an average temperature fluctuating between 1.9°C (35.4°F) and 5.6°C (42.1°F).Temperature
The average high-temperature is a cold 5.6°C (42.1°F) in December, hardly different from the 7.5°C (45.5°F) recorded in November. During December, Johnstone's nights hold steady with an average temperature of 1.9°C (35.4°F), barely dropping from the daytime highs.Humidity
January, September through December, with an average relative humidity of 89%, are the most humid months.Rainfall
In Johnstone, during December, the rain falls for 22.2 days and regularly aggregates up to 100mm (3.94") of precipitation. Throughout the year, there are 259.2 rainfall days, and 976mm (38.43") of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Johnstone, in December, during 2.5 snowfall days, 21mm (0.83") of snow is typically accumulated. In Johnstone, during the entire year, snow falls for 14.4 days and aggregates up to 160mm (6.3") of snow.Daylight
With an average of 7h and 6min of daylight, December has the shortest days of the year.On the first day of December in Johnstone, sunrise is at 8:24 am and sunset at 3:49 pm. On the last day of the month, sunrise is at 8:48 am and sunset at 3:54 pm GMT.
Sunshine
In December, the average sunshine in Johnstone is 3.5h.UV index
In Johnstone, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Experience reduced UV exposure by about half when donning a wide-brim hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Johnstone, United Kingdom
- Average high temperature in December: 5.6°C
The warmest month (with the highest average high temperature) is July (16.7°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in December: 1.9°C
The month with the highest average low temperature is July (10.1°C).
The coldest month (with the lowest average low temperature) is January (1.4°C).
Average pressure in December
Johnstone, United Kingdom
- Average pressure in December: 1008mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.8mbar).
Average wind speed in December
Johnstone, United Kingdom
- Average wind speed in December: 18.5km/h
The windiest month (with the highest average wind speed) is January (18.9km/h).
The calmest months (with the lowest average wind speed) are June and July (12.2km/h).
Average humidity in December
Johnstone, United Kingdom
- Average humidity in December: 89%
The months with the highest relative humidity are January, September, October, November and December (89%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in December
Johnstone, United Kingdom
- Average rainfall in December: 100mm
The wettest month (with the highest rainfall) is August (110mm).
The driest month (with the least rainfall) is April (44mm).
Average rainfall days in December
Johnstone, United Kingdom
- Average rainfall days in December: 22.2 days
The month with the highest number of rainy days is August (26.5 days).
The month with the least rainy days is February (18.3 days).
Average snowfall in December
Johnstone, United Kingdom
- Average snowfall in December: 21mm
The month with the highest snowfall is February (67mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Johnstone, United Kingdom
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Johnstone, United Kingdom
- Average daylight in December: 7h and 6min
The month with the longest days is June (Average daylight: 17h and 30min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in December: 3h and 30min
The month with the most sunshine is June (Average sunshine: 7h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in December
Johnstone, United Kingdom
- Average sunshine days in December: 5.9 days
The month with the most sunshine days is April (9.2 days).
The month with the least sunshine days is August (2.8 days).
Average UV index in December
Johnstone, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May, June and July (UV index 4).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Johnstone, United Kingdom
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in December
Johnstone, United Kingdom
- Average visibility in December: 8km
The months with the highest visibility are February, March, April, May and November (9km).
The months with the lowest visibility are January, June, July, August, September, October and December (8km).
